Gas and air mixer



Sept. 24, 1929. T. M. SHEVNIN GAS AND AIR MIXER Filed April 17, 1928 2 Sheets-Sheet 1 Inventor I fi/rawzzm,

Sept. 24, 1929. 'r. M. sHEVNIN I GAS AND AIR MIXER 2 Sheets-Sheet 2 I Inventor JLMS/Wanzm -""""'lll 4 Attornqy Patented Sept. 24, 1929 j UNITED STATES PATENT OFFICE THEUS MILES SHEVNIN, OF ALEXANDRIA, LOUISIANA GAS AND AIR MIXER Application filed April 17, 1928. Serial No. 270,786.

The present invention relates to an air and threaded in the upper end of the mixand gas mixer and is particularly well adapting chamber 26, which merges into a depended for use in conjunction with an internal ing L-shaped pipe 27, adapted to be coupled combustion engine, although by no means as at 28, with the intake manifold 29, of an limited to this particular use. internal combustion engine 30, in the present 5.-

The objects and advantages of the invenexample of the utility of the structure. The tion will become quite apparent from the valve B has a pipe 81, depending from its following description taken in conjunction opening 9 and on the lower end of the pipe with the accompanying drawings, wherein: 31 there is engaged an elbow coupling 32,

Figure 1 is an elevation of the device, from which ext-ends a pipe 33 threadedly 60 showing the same on an internal combustion tapped into one .side of the chamber 26. The

i smaller ends of the coresof the valves A and Figure 2 is a detail section taken substan- 5 face each other. tially on the line 22 of Figure 1. The lower extremltles of the cranks 22 are Figure 8 is a vertical section through the O set tOWarCl each other and secured togas cook and mixing chamber. gether by a bolt 35, or in any other suitable Figure 1 is a detail section taken substaner- A flat Valve 36 is hinged as at 37 tially on the line 4& of Figure 8, and on the valve casing 5 of the valve B for clos- Figure 5 is a detail section taken substanlng the opening 10 thereof for starting the so ti lly on th li 5- 5 f Figur engine this functioning as a choke. The gas 7 Referring to the drawing in detail, it will line 88 is coupled as at 39, with the opening 10 be seen that the letter A denotes a gas cock 0 e alve A. It Will thus be seen that the and the letter B an air cock. Th cocks suction created by the internal combustion are practically identical in construction, exg e, Ough the intake manifold 29 and cept for such diiferences as will be herein the plpe 27 Wlll set up a suction through the after pointed out. The cocks A and B comlXlng Chamber 26, thus causing the gas to prise cruciform casings 5, with conical bores he C t t rO gh the pipe 38, against that por- 6 extending therefrom for receiving tapered tion of the slide valve 14 projecting through core 7, which have transverse openings 8, the opening 8 in the cut Off valve A and t0 be rto legjgtgrable with openings 9 and 10 oppomixed with air in the mixing chamber 26 so sitely disposed in the casing. which comes through the pipe 33, the elbow The core 7 is provided with a bore 12, lead up ng 2, pipe 31 and through the valve ing from the larger end thereof into the B- The lume of gas and air passing opening 8, and a slide valve 14 is slidable in r gh he pipes would fi0W freely through Y5 this opening across the opening 8 and has at the transverse openings 1n the cores, but by its outer end a reduced threaded shank 15 e s 0f adjusting the slide valves across extending through a bracket 16, secured as at the transverse openings the flow is restricted 17, on the larger end of the core 7 and adand, as desired, regulated in its passages. just-ing nuts 18 are provided on the shank Obvlously the proper mixture may be atone to each side of the extremity of the tained by adjusting the slide valves 14 in the brackets 16. The smaller end of the core parts A and B, thus necessitating no adjusthas a reduced extension 19, on which is a ment of the cores. Of course, the cores are washer 20, a nut 21, a crank 22, and a nut adjustable by rocking the cranks 22, depend- 23, in the order mentioned. The nut 21 ading upon the speed desired. It will further justs the core in the bore 6, to compensate be seen that an adjustment may be had by adfor any wear, while the nut 23 holds the justing the cranks in relation to each other, crank in place which is keyed to the extenas these cranks are provided with elongated sion 19, as is indicated at 24C. arcuate slots 40 through which the bolt 35 The opening 9 of the valve A has a pipe extends. This gas and air mixer may be used 5" extension 25 leading downwardly therefrom in place of the usual gasoline carburetor on 0 hydro-carbon engines, and an efficient performance will be attained thereby. There are numerous advantages derived from this air and gas mixture, the most important one being that the cost of the amount of gas used is much less than that of the ordinary carburetor. T he dilution in the crank case of oil is reduced to a minimum. A perfect gaseous mixture is effected, not like that of an atomized mixture found in the case of gasoline which gives an easier and more complete combustion. It may be used to burn the gas directly in the engine. The structure is exceedingly simple, inexpensive to manufacture, strong and durable, thoroughly efticient and reliable in use and operation, and otherwise well adapted to the purpose for which it is designed.

The lower end of the pipe 25 has a tapered funnel shaped end and will blow the incoming gas across the incoming air at a rapid rate in the mixing chamber :26.

With the above and numerous other objects in view, as will appear to those skilled in the art after a study of this disclosure, the invention resides in certain novel features of construction and in the combination and arrangement of parts as will be hereinafter more fully claimed.

The present embodiment of the invention has been disclosed in detail merely by way of example, since in actual practice itattains the features of advantage enumerated as desirable in the statement of the invention and the above description.

It will be apparent that changes in the details of construction and in the combination and arrangement of parts may be resorted to, without departing from the spirit or scope of the invention as hereinafter claimed or sacrificing any of its advantages.

Having thus described my invention, what I claim as new is:

1. An air and gas mixing device comprising in combination, a mixing chamber, a pipe rising from the mixing chan'iber, a valve casing on the pipe, a pipe leading laterally from the mixing chamber and terminating in a riser, a valve casing on the riser, a rotatable core mounted in the respective valve casings and provided with transverse openings, slide valves in the cores and adapted to extend across the transverse openings, means for adjusting the slide valves, means for operating the cores simultaneously, means for adjusting the cores relative to each other and a flat valve hingedly connected with the valve casing on the riser at the intake thereof.

' 2. An air and gas mixing device comprising in combination, a mixing chamber provided with a pair of inlets and an outlet, a gas pipe and an air pipe connected to the respective inlets, a pipe leading from said outlet and adapted to be connected with an internal combustion engine, valve casings having oppositely disposed openings and being mounted on the gas and air pipes respectively, each of said casings having a conical bore extending therethrough, tapered cores rotatable in the bores, and having transverse openings registrable With the openings in the casings, a slide valve carried by the cores and adapted to extend across said transverse openings, said valves being adjustable to regulate the flow of the respective fluids into the said mixing chamber, crank members keyed to the cores at their respective smaller ends, the free ends of said cranks being offset, and adapted for connecting together thereat, for simultaneously adjusting said cores, means for adjusting said cranks relative to each other, and a fiat valve hingedly connected to said air valve casing at one opening thereof, said valve adapted to function as a choke.

In testimony whereof I aflix my signature.

THEUS MILES SHEVNIN. 

